Dev tools · alternatives · 2026
24 alternatives to Open-source in-browser code editor/executor with REPL, 10+ languages
I am super excited to open-source the code executor behind logicboard.com - an in-browser collaborative code editor. The backend is written in Elixir+Phoenix and implements a WebSocket API to execute code in docker containers. Next steps include making this more secure, I am considering Google's gVisor to implement better isolation between containers and the host kernel.
This is an open-source in-browser code editor and executor that supports over 10 programming languages with a built-in REPL. The backend uses Elixir and Phoenix to run code in Docker containers via WebSocket, enabling… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Open-source in-browser code editor/executor with REPL, 10+ languages launched in 2023; newer entries below may have overtaken it.
- 1
I am super excited to open-source the code executor behind logicboard.com - an in-browser collaborative code editor. The backend is written in Elixir+Phoenix and implements a WebSocket API to execute code in docker containers. Next steps include making this more secure, I am considering Google's gVisor to implement better isolation between containers and the host kernel.
2023 · github.com · its alternatives →
- 2IM
I made a Logicboard.com — A collaborative code editor with code-replay feature. Code-replay lets you run the coding session like a movie, I wrote a blog post on how I implemented this: https://logicboard.com/blog/code-replay You can try out the demo here: https://logicboard.com/demo/:replay And play around with the code editor here: https://logicboard.com/demo/ Logicboard also has an REPL shell, just type "start()" and hit enter in the output area.
2023 · logicboard.com · its alternatives →
- 3
Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets
2020 · insomnia.rest · its alternatives →
- 4
Hello everyone! I'm currently in a journey to learn and improve my Elixir and Go skills (my daily job uses C++) and looking through my backlog for projects to take on I decided Elixir is the perfect language to write a highly-parallel BitTorrent tracker. So I have spent my free time these last 3 months writing one! Now I think it has enough features to present it to the world (and a docker image to give it a quick try). I know some people see trackers as relics of the past now that DHT and PEX are common but I think they still serve a purpose in today's Internet (purely talking about public…
2025 · github.com · its alternatives →
- 5
This is the entire Firefox browser rendering to a element. Gecko, all UI components, and the Spidermonkey JS engine are all compiled and running in WebAssembly. Here are a few things you might find interesting: - This is fully end to end encrypted! We use the WISP protocol for TCP-over-websockets. - There is a novel WASM->JS JIT for experimental site speedup - This port cost over 25k in opus/fable tokens for debugging and JIT research This was just a fun experiment to push the boundaries of WebAssembly. For a more usable "browser in browser" experience, we also built…
Jul 2026 · developer.puter.com · its alternatives →
- 6
Repl.it▲399Code and deploy apps in any language right from your browser
2018 · replit.com · its alternatives →
- 7
Code.xyz▲378The online code editor for building APIs in a single click.
2018 · namekeeper.com · its alternatives →
- 8
Hi HN! I've been working on a code editor and I think that it's mature enough to catch some interest. It's using a custom GPU accelerated GUI written in C++. Currently implements some interesting features: LSP, terminal, auto-completion, linters, formatters, custom keybindings, plugins and more. It's a hobby project but still intends to be an alternative to other popular code editors like Sublime, Kate, Lapce, Lite XL (and takes inspiration from them). The project was born as a playground for the GUI I'm developing (eepp GUI) and is advanced enough to currently be my main code editor, but…
2023 · github.com · its alternatives →
- 9
Run KolibriOS, Linux or Windows 98 in your browser
2022 · copy.sh · its alternatives →
- 10
Keystone▲125We kept hitting the same wall: you clone some arbitrary repo and just want it to run without any configuration work. So we built Keystone, an open source tool that spins up a Modal sandbox, runs Claude Code inside it, and produces a working .devcontainer/ config (Dockerfile, devcontainer.json, test runner) for any git repo. We build on the dev container standard, so the output works with VS Code and GitHub Codespaces out of the box. Main use cases: reproducible dev/CI environments, self-describing repos, and safely sandboxed coding agents. Our goal is to encourage all repos to…
Mar 2026 · github.com · its alternatives →
- 11
- 12
- 13
You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against local test cases, and shows the result. It currently supports around 1.4k problems and multiple languages, including Python, C++, Rust, Java, Go, TypeScript, Swift, and others. The project is still an MVP. System design, SQL, and concurrency problems are not supported yet, but support for more problem types is planned. Made in Haskell!
Aug 2026 · github.com · its alternatives →
- 14CC
- 15AP
2015 · fatiherikli.github.io · its alternatives →
- 16RE
2015 · play.elixirbyexample.com · its alternatives →
- 17
Hi HN! I’m so excited to show my first open-source project and first post here. I initially started this project to learn Go language, it is an experimental project. The main goal is to track the adventure of a WebRTC stream from start to finish, by debugging the project or tracking the output at console. By trying out this project, you will deep dive into the steps which are taken while starting up a WebRTC session, and more. It consists of a web UI (TypeScript) and a server back-end (Golang) projects. They can run on Docker containers, in development mode or production mode, you can find…
2022 · github.com · its alternatives →
- 18
SharePad is a free online code interview tool, it has a real-time collaborative code editor, you can run code with built-in compilers.
2021 · sharepad.io · its alternatives →
- 19IM
Hey developers I think we're tired of copying and pasting our codes and sharing links using PasteBin, GithubGist, or Slack. What if you could share the codes without copying the link and share them right from your favorite editor? That was the motivation for creating TurboGist. Right now, it's still in the MVP stage, and I'm trying to gather feedback from developers like you. It's available as a beta in the VS Code Extension store. Can you guys check this out? It'd help me a lot. You don't need to pay any penny, 100% FREE. However, I'm working on introducing a self-hosted feature. Besides, a…
2025 · turbogist.dev · its alternatives →
- 20
- 21
Hey guys! I’ve been working on a web app called CodeCafé—a collaborative, browser-based code editor inspired by VS Code and Replit, but with no downloads, no sign-up, and zero setup. You just open the link and start coding—together. The frontend is built with React and TypeScript, and the backend runs on Java with Spring Boot, which handles real-time editing via WebSockets. For syncing changes, I’m using Redis along with a custom Operational Transformation system (no third-party libraries!!!). The idea came after I found out a local summer school was teaching coding using Google Docs (yes,…
2025 · github.com · its alternatives →
- 22
- 23
When the startup I was working for shut down, I knew it would probably be a while before my health allowed me to commit to a new role, so I decided to start working on some personal projects to keep my mind active and engaged. With AI-augmented VS Code forks being all the rage at the time, I wanted to take a slightly different angle on a code editor/viewer using the same core technology. That led me to building Tachi Code, a Monaco-based code editor that integrates directly into your browser as an extension to streamline your more ephemeral coding tasks, so you can spend less time…
2025 · tachicode.dev · its alternatives →
- 24IV
Have been building a web IDE & browser based code editor and v2.0 has now launched. Contains a whole load of features beyond just code highlighting such as online & offline use, code completion, type boosting, Emmet, database management, find & replace builder, auto backups, Github syncing and a whole lot more. Oh, and it's free & open source. Any and all feedback welcomed.
2013 · icecoder.net · its alternatives →
Also compare
- Open-source in-browser code editor and REPL in 10+ languages alternatives
- I made an in-browser code editor with code replay and REPL alternatives
- Insomnia Designer – Open-source collaborative editor for API design alternatives
- I wrote a new BitTorrent tracker in Elixir alternatives
- Firefox in WebAssembly alternatives
- Repl.it alternatives
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →